/* eslint-disable */
require('script-loader!file-saver');
require('./Blob');
// require('script-loader!xlsx/dist/xlsx.core.min');
import XLSX from "@/utils/xlsx/xlsx.js"
function generateArray(table) {
    var out = [];
    var rows = table.querySelectorAll('tr');
    var ranges = [];
    for (var R = 0; R < rows.length; ++R) {
        var outRow = [];
        var row = rows[R];
        var columns = row.querySelectorAll('td');
        for (var C = 0; C < columns.length; ++C) {
            var cell = columns[C];
            var colspan = cell.getAttribute('colspan');
            var rowspan = cell.getAttribute('rowspan');
            var cellValue = cell.innerText;
            if (cellValue !== "" && cellValue == +cellValue) cellValue = +cellValue;

            //Skip ranges
            ranges.forEach(function (range) {
                if (R >= range.s.r && R <= range.e.r && outRow.length >= range.s.c && outRow.length <= range.e.c) {
                    for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null);
                }
            });

            //Handle Row Span
            if (rowspan || colspan) {
                rowspan = rowspan || 1;
                colspan = colspan || 1;
                ranges.push({ s: { r: R, c: outRow.length }, e: { r: R + rowspan - 1, c: outRow.length + colspan - 1 } });
            }
            ;

            //Handle Value
            outRow.push(cellValue !== "" ? cellValue : null);

            //Handle Colspan
            if (colspan) for (var k = 0; k < colspan - 1; ++k) outRow.push(null);
        }
        out.push(outRow);
    }
    return [out, ranges];
};

function datenum(v, date1904) {
    if (date1904) v += 1462;
    var epoch = Date.parse(v);
    return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);
}
// 默认样式配置
var defaultCellStyle = {
    font: {
        name: '宋体',
        sz: 12,
        color: { rgb: '000000' },
        bold: false,
        italic: false,
        underline: false
    },
    alignment: {
        horizontal: 'center',
        vertical: 'center',
        indent: 0
    }
}
function sheet_from_array_of_arrays(data, opts) {
    var ws = {};
    var range = { s: { c: 10000000, r: 10000000 }, e: { c: 0, r: 0 } };
    for (var R = 0; R != data.length; ++R) {
        for (var C = 0; C != data[R].length; ++C) {
            if (range.s.r > R) range.s.r = R;
            if (range.s.c > C) range.s.c = C;
            if (range.e.r < R) range.e.r = R;
            if (range.e.c < C) range.e.c = C;
            var cell = {
                v: data[R][C],
                s: defaultCellStyle
            };
            if (cell.v == null) continue;
            var cell_ref = XLSX.utils.encode_cell({ c: C, r: R });

            if (typeof cell.v === 'number') cell.t = 'n';
            else if (typeof cell.v === 'boolean') cell.t = 'b';
            else if (cell.v instanceof Date) {
                cell.t = 'n';
                cell.z = XLSX.SSF._table[14];
                cell.v = datenum(cell.v);
            }
            else cell.t = 's';

            ws[cell_ref] = cell;
        }
    }
    if (range.s.c < 10000000) ws['!ref'] = XLSX.utils.encode_range(range);
    return ws;
}

function Workbook() {
    if (!(this instanceof Workbook)) return new Workbook();
    this.SheetNames = [];
    this.Sheets = {};
}

function s2ab(s) {
    var buf = new ArrayBuffer(s.length);
    var view = new Uint8Array(buf);
    for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
    return buf;
}

export function export_table_to_excel(id) {
    var theTable = document.getElementById(id);
    console.log('a')
    var oo = generateArray(theTable);
    var ranges = oo[1];

    /* original data */
    var data = oo[0];
    var ws_name = "SheetJS";
    console.log(data);

    var wb = new Workbook(), ws = sheet_from_array_of_arrays(data);

    /* add ranges to worksheet */
    // ws['!cols'] = ['apple', 'banan'];
    ws['!merges'] = ranges;

    /* add worksheet to workbook */
    wb.SheetNames.push(ws_name);
    wb.Sheets[ws_name] = ws;

    var wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: false, type: 'binary' });

    saveAs(new Blob([s2ab(wbout)], { type: "application/octet-stream" }), "test.xlsx")
}

function formatJson(jsonData) {
    console.log(jsonData)
}
export function export_json_to_excel(th, jsonData, defaultTitle) {

    // 初始化数据
    /* original data */

    var data = jsonData;
    data.unshift(th);


    var ws_name = "SheetJS";
    var wb = new Workbook(), ws = sheet_from_array_of_arrays(data);



    /*设置worksheet每列的最大宽度*/
    const colWidth = data.map(row => row.map(val => {
        /*先判断是否为null/undefined*/
        if (val == null) {
            return { 'wch': 10 };
        }
        /*再判断是否为中文*/
        else if (val.toString().charCodeAt(0) > 255 && val.toString().charCodeAt(val.toString().length - 1) < 255) {
            // 头部中文 尾部英文
            return { 'wch': val.toString().length * 1.5 };
        }
        else if (val.toString().charCodeAt(0) > 255) {
            // 纯中文
            return { 'wch': val.toString().length * 2.2 };
        }
        else {
            return { 'wch': val.toString().length * 1.2 };
        }
    }))
    /*以第一行为初始值*/
    let result = colWidth[0];
    for (let i = 1; i < colWidth.length; i++) {
        for (let j = 0; j < colWidth[i].length; j++) {
            if (result[j]['wch'] < colWidth[i][j]['wch']) {
                result[j]['wch'] = colWidth[i][j]['wch'];
            }
        }
    }
    ws['!cols'] = result;;

    //   /* add worksheet to workbook */
    wb.SheetNames.push(ws_name);
    wb.Sheets[ws_name] = ws;
    var data = wb.Sheets[wb.SheetNames[0]];
    data['!rows'] = [{ hpx: 30 }]

    // 设置标题 单元格样式 
    let borderAll = {  //单元格外侧框线
        top: {
            style: 'thin'
        },
        bottom: {
            style: 'thin'
        },
        left: {
            style: 'thin'
        },
        right: {
            style: 'thin'
        }
    };
    let arr = ["A1", "B1", "C1", "D1", "E1", "F1", "G1", "H1", "I1", "J1", "K1", "L1", "M1", "N1", "O1", "P1", "Q1", "R1", "S1", "T1", "U1", "V1", "W1", "X1", "Y1", "Z1"];
    arr.some(function (v) {
        if (data[v]) {
            data[v].s = {
                border: borderAll,
                fill: {
                    fgColor: { rgb: 'daeef3' },
                    height: 60
                },
                font: {
                    name: '宋体',
                    sz: 12,
                    color: { rgb: "595959" },
                    bold: true,
                    italic: false,
                    underline: false,
                    height: 60
                },
                alignment: {
                    horizontal: "center",
                    vertical: "center"
                },
            }
        }
    })
    var wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: false, type: 'binary' });
    var title = defaultTitle || '列表'
    saveAs(new Blob([s2ab(wbout)], { type: "application/octet-stream" }), title + "--" + Date.parse(new Date()) + ".xlsx")
}
